With the clock ticking, Luke and Emma make tough choices to finish the mission and stay alive. A big day for the Brunner family spirals out of control.

As the clock ticks down to zero hour, Luke and the crew must break into a top-secret facility before their adversary turns off the lights — for good.

Amid a devastating family emergency, Luke finds the lines of his double life becoming blurry as he deals with a distracted Emma and a demanding Boro.

Every second counts as the team scrambles by land, air and sea to avert a catastrophe. Aldon finds himself outnumbered — but not outmatched.

Barry hitches a ride to the final frontier. As an operative's cover story begins to crumble, Luke and Emma seek help from an unexpected ally.

It's a sink-or-swim mission when Luke and the team dive into deadly waters to stop a sinister terrorist from making a massive splash.

A face from the past threatens Luke and Tally's recharged romance. The team breaches a fortified compound to keep vital intel out of enemy hands.

With his retirement from the CIA imminent, Luke prepares for his next adventure, but revelations at home and an urgent matter at work upend his plans.

Forced to team up in order to take down Boro, Luke and Emma realize their newly strained relationship is only the start of their problems.

As Greta attempts to loosen Luke's lips, the safe-house gang gets an earful from afar. Emma turns heads on the dance floor with an unlikely date.